#include <iostream>
#include <bits/stdc++.h>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");

int main()
{
    int n,s=0,x;
    f>>n;
    for(int i=1; i<=n;i++)
    {f>>x;
    s=(s+pow(x,x));
    g<<s%10<<endl;
    }


    return 0;
}